// Copyright (c) 2013-2015 Sandstorm Development Group, Inc. and contributors
// Licensed under the MIT License:
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

use capnp::capability::Promise;
use capnp_rpc::{rpc_twoparty_capnp, twoparty, RpcSystem};

use crate::hello_world_capnp::hello_world;

use futures::task::LocalSpawn;
use futures::{AsyncReadExt, FutureExt};
use std::net::ToSocketAddrs;

struct HelloWorldImpl;

impl hello_world::Server for HelloWorldImpl {
    fn say_hello(
        &mut self,
        params: hello_world::SayHelloParams,
        mut results: hello_world::SayHelloResults,
    ) -> Promise<(), ::capnp::Error> {

        let request = params.get().unwrap().get_request().unwrap();
        let name = request.get_name().unwrap();
        let message = format!("Hello, {}!", name);

        results.get().init_reply().set_message(&message);

        Promise::ok(())
    }
}

pub fn main() {
    let args: Vec<String> = ::std::env::args().collect();
    if args.len() != 3 {
        println!("usage: {} server ADDRESS[:PORT]", args[0]);
        return;
    }

    let addr = args[2]
        .to_socket_addrs()
        .unwrap()
        .next()
        .expect("could not parse address");

    let mut exec = futures::executor::LocalPool::new();
    let spawner = exec.spawner();

    exec.run_until(async move {
        let listener = async_std::net::TcpListener::bind(&addr).await.unwrap();
        let hello_world_client: hello_world::Client = capnp_rpc::new_client(HelloWorldImpl);

        loop {
            let (stream, _) = listener.accept().await.unwrap();
            stream.set_nodelay(true).unwrap();
            let (reader, writer) = stream.split();
            let network = twoparty::VatNetwork::new(
                reader,
                writer,
                rpc_twoparty_capnp::Side::Server,
                Default::default(),
            );

            let rpc_system =
                RpcSystem::new(Box::new(network), Some(hello_world_client.clone().client));

            spawner
                .spawn_local_obj(Box::pin(rpc_system.map(|_| ())).into())
                .unwrap();
        }
    });
}
